Remove unnecessary condition in if statements

[chakku000]

The code satisfies the condition in the first line when endTxnErr is not nil.
Therefore, when it reaches the third line, endTxnErr must always be nil. As a result, I think the endTxnErr == nil check in the third line is redundant.

if !willTryCommit || endTxnErr != nil {
    ...
} else if willTryCommit && endTxnErr == nil {
    ...
}